How is the gas-cap test related to the VI?

• A. The gas-cap test is a separate procedure; the VI checks the cap visually.
• B. The VI performs the gas-cap pressure test as part of the inspection.
• C. The VI ignores the gas cap entirely.
• D. The gas-cap test determines tire pressure.

Answer: (A)

Gas-cap testing and the visual inspection address different checks. The gas-cap test is a separate procedure that evaluates the fuel system’s evaporative (EVAP) integrity using specialized equipment to detect leaks. The visual inspection, on the other hand, only looks at the cap’s presence and physical condition—making sure a cap is there, properly installed, not damaged, and that it can seal when tightened. Because the leak-detection test requires its own procedure, it isn’t done during the VI. So the gas-cap test and the VI relate as separate steps, with the VI focusing on visually verifying the cap.